Other Accrued Liabilities (Summary of Accrued Liabilities and Accounts Payable) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Payables and Accruals [Abstract]
Accrued marketing costs	$ 30,021	$ 29,384
Accrued compensation costs	8,782	15,535
Accrued broker commissions	1,179	1,782
Income taxes payable	3,005	3,840
Accrued professional fees	2,662	2,412
Accrued production costs	5,215	4,580
Income tax related payable	13,921	19,000
Other accrued liabilities	8,346	7,128
Total other accrued liabilities	$ 73,131	$ 83,661